unclear fact

In fact, estrogen has been reported to have a protective effect on colon cancer in several large-scale population studies; however the underlying mechanism is unclear.

事实上，近年来大量临床研究已证实，雌激素对结直肠癌可能有预防作用，但是其机制仍不明确。

We are very upset with the fact, that some value us by unclear rumors.

我们因为一个事实而沮丧, 那就是有些人以未澄清的谣言来判定我们的价值.

Companies often think they have communicated their values when, in fact, they remain unclear to the rank and file.

公司通常认为自己的价值观已经广为人知，而实际上普通员工并不清楚。

Therefore, nobody has the right to criticise the government for unclear fact.

所以, 我们没有权力在事实不明的情况下批评政府.